A couple of years ago I bought a 1987 Dodge B250 which purportedly had
120,000 miles on it. After the first oil change, I disovered that my oil pressure was falling down to near zero at idle when the engine (a 360, btw), is warmed up. Okay, so I change first the oil pump, then the sender, and finally the pressure gauge, with no change. Finally, I switch it to 15W50 oil, and the problem is solved -- presssure is up to 40 psi when running, and no lower than 20 at idle, from which we deduce that I need main bearings. So, my question is: should I take this as an indicator that this engine as gone around more than once? it seems to have lots of power, doesn't BURN any oil that I can detect -- I use the van infrequently, so it's difficult to say for certain, but it definitely doesn't smoke or do anythying that's in any way problematic. Is it worth putting in bearings, or would I be better advised to just get a low-mileage engine -- maybe even a 5.9 Magnum ;^)I'd be inclined to just sell it, but it's really nicely equipped -- 360/727 torqueflite, limited slip rear, electric windows & door locks, factory interior, cruise control, tilt wheel , trailer towing package, heavy suspension. . . and everything even works!
What do you think? I've had many 100k+ vehicles, and have never seen bearings go in so short a time, which leads me to surmise that maybe it has a lot more than 120k on it.
Thanks.
Joe